BioZ: A Portable Multi-Frequency Bioimpedance Sensor

In this article, we present BioZ, a compact, low-power, and cost-effective bioimpedance sensor designed for multi-frequency impedance analysis with Bluetooth connectivity. To assess its accuracy, in vitro measurements were conducted and benchmarked against the Zurich MFIA, a high-precision impedance analyser. The sensor's performance was evaluated using four-electrode measurements on electrical models of human body segments. Additionally, two-electrode configurations demonstrated its ability to measure impedance up to 1 MΩ and operate across a broad frequency range from 200 Hz to 200 kHz. These results highlight BioZ as a promising tool for portable bioimpedance analysis.Clinical relevance- A portable bioimpedance device enables home-based patient monitoring and diagnosis, such as monitoring fluid balance in patients with chronic conditions, making healthcare more accessible and continuous.